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- Title
Cobalt-modified nickel-zinc catalyst for electrooxidation of methanol in alkaline medium.
- Authors
Altunbaş Şahin, Ece; Kardaş, Gülfeza
- Abstract
Cobalt-modified nickel-zinc catalyst CuNi(Zn)Co is prepared on a copper substrate by using electrodeposition. Its catalytic efficiency for methanol oxidation is studied with cyclic voltammetry, chronoamperometry, and chronopotentiometry techniques. The surface morphology and chemical composition of catalyst are characterized by scanning electron microscopy and energy dispersive X-ray spectroscopy. The oxidation kinetic parameters activation energy ( Ea), active species on the surface (Γ), and rate constant ( k) are determined from cyclic voltammograms which are performed at different methanol concentrations and temperatures. The results show that Ni(Zn)Co catalyst has higher catalytic activity than Ni, Co, and NiZn coatings as a composite catalyst for a promising choice of methanol electrooxidation in the alkaline medium.
- Subjects
COBALT catalysts; NICKEL catalysts; OXIDATION of methanol; ALKALINE solutions; ELECTROFORMING; CYCLIC voltammetry; SCANNING electron microscopy; SURFACE morphology
- Publication
Journal of Solid State Electrochemistry, 2013, Vol 17, Issue 11, p2871
- ISSN
1432-8488
- Publication type
Article
- DOI
10.1007/s10008-013-2197-x